方法

公式

值域

ROR

$\text{ROR}=\frac{a/c}{b/d}$

$SE\left(\ln \text{ROR}\right)=\sqrt{\frac{1}{a}+\frac{1}{b}+\frac{1}{c}+\frac{1}{d}}$

$95\%CI=e^{\ln \left(\text{ROR}\right)\pm 1.96\sqrt{\left(\frac{1}{a}+\frac{1}{b}+\frac{1}{c}+\frac{1}{d}\right)}}$

a ≥ 3, 95% CI > 1

PRR

$\text{PRR}=\frac{a/\left(a+b\right)}{c/\left(c+d\right)}$

$SE\left(\ln \text{PRR}\right)=\sqrt{\left(\frac{1}{a}-\frac{1}{a+b}+\frac{1}{c}-\frac{1}{c+d}\right)}$

$95\%CI=e^{\ln \left(\text{PRR}\right)\pm 1.96\sqrt{\left(\frac{1}{a}-\frac{1}{a+b}+\frac{1}{c}-\frac{1}{c+d}\right)}}$

a ≥ 3, PRR ≥ 2, x² ≥ 4